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The ventilation butterfly valve is a non-sealing type butterfly valve, which is applied in ventilation and environmental protection projects in industries such as chemical engineering, building materials, power stations, and glass manufacturing.
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Manual butterfly valve manually controls the opening and closing of air ducts, suitable for flues and dust removal pipelines to adjust air volume.
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Valve and piping expansion joints absorb thermal expansion and contraction; they feature reinforced, secure packaging and support fast global shipping#Expansion joint
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